Study: Flu shots are more effective in the morning than afternoon

ENGLAND (WIVB) — Scientists say getting a flu shot in the morning could be more effective than getting one later in the day.

This finding could save lives, especially for older people who are more likely to die from the flu.

This was a relatively small study in the U.K. The journal Vaccine published the results this week.

The study focused on adults older than 65. 276 people received vaccines against three different strains of flu, either during the morning or the afternoon.

The morning group had more antibodies one month after the vaccination, compared to the afternoon group. This was true for two out of the three influenza strains.

One of the study authors wrote, “We know there are fluctuations in immune responses throughout the day and wanted to examine whether this would extend to the antibody response to vaccination.”

They’re going to do more research and look at other conditions like kidney disease and diabetes. Doctors think this could lead to big changes.

It would be easy to shift the time of day when they offer vaccinations, and it would be an inexpensive thing for healthcare providers to do.

The bottom line is: This could save lives.

MORE | Read more about the study here. provides commenting to allow for constructive discussion on the stories we cover. In order to comment here, you acknowledge you have read and agreed to our Terms of Service. Commenters who violate these terms, including use of vulgar language or racial slurs, will be banned. Please be respectful of the opinions of others. If you see an inappropriate comment, please flag it for our moderators to review. Note: Comments containing links are not allowed.

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